Fade effect option "From Top" animating differently for different users

In Storyline 2 I'm using the Fade In and Fade Out animations on a caption with the options to come in from the top and out toward the bottom. On my and most of my coworkers' computers it looks as intended with a short movement down as it fades in and then another short movement down as it fades out. When I view it on one particular colleague's computer the movement is much bigger, flying in from the top of the slide and out clear to the bottom.

It doesn't seem to matter whether it's published or not, or on whose computer it was published; whenever this colleague opens either a copy of my Storyline file on her computer or views the course on our network after I've published and uploaded it from my computer, these animations are different between our computers.

Has anyone else seen this kind of variability using these options? I know I could get the desired effect using a fade and motion path together, I was just surprised that there would be this dramatic difference between users and I'm not going to be able to let it go until I figure out what's going on.

(NOTE: I cannot upload an example due to company policy restrictions)